Insulator.



W. G. E & F L. SHAW.

ULAT

APPLICATION FILED .1914.

1 ,200,294:. I Patented Oct. 3, 1916.

UNITED STATES PATENT OFFICE.

WILLIAM GEORGE AYRE, OF BAKER, AND FREDERICK LENN'ARID SHAW, OF DURKEE,

OREGON. A

INSULATOR.

Specification of Letters Patent.

Patented Oct. 3, 1916.

Application filed January 9, 1914. Serial No. 811,281.

To all whom it may concern:

Be it known that we, WILLIAM GEORGE AYRE and FREDERICK LENNARD SHAW,citi- Zens of the United States, residing at Baker and Durkee,respectively, in the county of Baker and Stateof Oregon, have inventedcertain new and useful Improvements in Insulators, and do declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,and to the letters and figures of reference marked thereon, which form apart of this specification.

This invention relates to insulators for electric wires such as arecommonly employed for the transmission of electrical currents and iswhat may be termed a self locking tieless insulator in that the Wire isautomatically locked within the insulator and requires no tying orfastening thereto as is usually employed in devices of this character,and also prevents the insulator from unscrewing, while the constructionof the insulator provides for a free sliding movement of the wire, as isfrequently advantageous in running and constructing the lines.

The construction of the initial wire groove or passage in the insulatorprovides for ready insertion of the wire into the insulator while thewire is in a taut or tightly strung condition as no bends or curves inthe wire are necessary for its initial application to the insulator.

In the use of this insulator the wire has a free sliding movement so asto accommodate itself to expansion and contraction without straining theinsulator or the post or other support to which the same is attached.

By the use of this device, untying and re-tying of wires to theinsulators in the event of repairing the line is entirely eliminated.

By the use of insulators constructed in accordance with this invention asingle lineman can in most instances handle the line without assistanceand can attach and detach the same from the insulators.

The invention consists in the novel construction of the insulator whichprovides for automatically locking the line in proper position withinthe insulator and thereby dispose of the usual tying and fasteningusually needed-in insulators of this character.

The invention consists in certain novel features of construction all ofwhich will be first fully described and afterward specifically pointedout in the appended claims.

Referring to the accompanying drawing: Figure l is an elevation of aninsulator con structed in accordance with this invention. F 1g. 2 1s avertical sectional view through the same. Fig. 3 is a transversesectional View taken on line 33 of Fig. 2. Fig. 4 is a transversesectional view taken on line 44: of Fig. 2, and Fig. 5 is an elevationillustrating the insulator formed in a slightly different shape in whichthe wire is received from the bottom thereof.

Like numerals of reference indicate the same parts throughout theseveral figures in which 1 indicates the insulator which may be formedas shown in Fig. 1 or formed as shown in Fig. 5, it being clearlyunderstood that the external form of the insulator is immaterial as faras this invention is concerned, as is also the method of'hanging orsupporting the same as the insulator may be so constructed and arrangedthat it may receive the wire from any part thereof.

Referring now to the drawing it will be seen that the insulator isprovided with a deep and straight slot 2 which enters the same in themanner as shown, it being essential that the initial opening or slot 2be straight and arranged in line with the wire. Upon one side of theinsulator there is formed a conveXed projection 3 while upon theopposite side of the slot and directly opposite the said conveXedprojection 3 there is arranged a concaved recess 4, said convexedprojection 3 and concaved recess 4 being curved in cross section asshown in Fig. 3. The convexed projection 3 terminates at the point 5,the insulator being undercut at this point to the point 6 so as toprovide a straight groove or channel 7 transversely of the insulator;while it will be seen from Fig. 4 that the wall 8 of the channel passage7 is curved or flared outwardly at the end 9 while' the wall 10 of saidchannel or passage 7 is curved or flared outwardly at the end 11.

From an inspection of Fig. 1 it will be seen that the convexedprojection 3 extends entirely across the channel? in such manner as toprevent a wire from passing upwardly out of the channel 7 into the slot2 when the said Wire is in a straight or taut position.

As will appear from Fig. 1 a threaded recess 12 is provided in thebottom of the insulator to connect the same to a suitable support, whilein Fig. 5 the said threaded recess 12 is shown in dotted lines in whichlatter figure the position of the Wire receiving and locking arrangementis arranged to receive the wire from the bottom of the insulator.

Having thus fully described the construction of this invention itsoperation is. as follows: The insulator being formed as shown in theaccompanying drawing the wire is passed into the deep and straight slot2 until it engages the conveXed projection 8. The advantages of the deepand straight construction of the initial slot 2 is that in theapplication of taut or tightly strung wires, said taut or tightly strungwires will readily enter the deep and straight initial slot 2 withoutfirst having to impart to the wire any bend or curve. The wire beingtaut and flexible a slight curvature or bend is imparted to the wireupon passing out of the deep straight initial slot 2 by reason of thegradual rounded form of the conveXed projection 3, the wire being forcedat this point into the concaved recess l of the insulator and progressesinwardly in this position until it reaches the bottom of the convexedprojection 3 at which point it drops into the transverse channel 7 andunderneath the conveXed projection 3. W hen in this position the wire issecurely and permanently locked within the channel 7, it being a matterof physical impossibility so remove the wire While the same is lying ina straight lined position within the wire receiving channel 7, while thewire cannot be removed from the channel 7 accidentally and while in atight and operative position the same can readily be detached from theinsulator whenever desired by curving the wire so as to enter theconcaved recess lin the insulator in which position it will be movedfrom under the convexed projection 3 and can be readily withdrawn fromthe slot 2.

Having thus fully described the invention it is apparent that certainimmaterial changes and alterations can be made in the construction shownin the accompanying drawing, and we consider ourselves clearly entitledto all such changes and modifications as fall within the limit and scopeof the appended claims.

W hat we claim as new and desire to secure by Letters Patent of theUnited States is 1. An insulator of the type described, having aline-wire receiving slot, said slot opening out through the upper end ofsaid insulator, with its walls extending from said upper end downwardlyin right or straight lines a certain distance, said slot-walls incontinuation farther downwardly being curved upon convex and concavelines, re spectively, with the convexity and concavity of said wallsterminating inwardly short distances from the lateral outer surfaces oftne insulator, the terminals of said walls at said points being producedupon straight or right lines, the inner ends of said slot-Wallsterminating in a right-angled undercut groove. Y

2. An insulator of the type described including a deep straightline-wire receiving slot having its walls extending from the outersurface of the insulator inwardly thereof in right or straight lines,said slot walls in continuation farther inwardly being curved uponconvex and concave lines respectively to receive a wire from said rightor straight line walls to impart a bend to the wire in conformity to theconvex and concave wall portions, the inner ends of said slotwallsterminating in a right angled undercut groove.

In testimony whereof we afiiX our signatures in presence of twowitnesses.

WILLIAM GEORGE AYRE. FREDERICK LENNARD SHAW. Witnesses O. B. MOUNT, F.E. KonHLnR.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, I). G.

